Wallpaper Groups

Symmetry group 12 (p4g)

Like the last group, this group also contains reflections and rotations of orders 2 and 4. But the axes of reflection are perpendicular (none at 45°), and none of the centers of the rotations of order 4 lie on the reflection axes. Again, the lattice is square, and an eighth of a square fundamental region of the translation group is a fundamental region for the symmetry group.